论文部分内容阅读
开展了向中碳45结构钢中加入S、Ca元素来改善切削性的研究。研究结果表明:钢中w([S])=0.06%,总钙w(T[Ca])=40×10-6,w([Al]s)=0.01%左右时,夹杂物的纺锤率为57%;小于2.5μm的夹杂物数量占夹杂物总数82%,夹杂物呈细小、弥散状态分布于钢中。由热模拟试验得出钢的塑性转变温度在1 100~1 000℃,通过配水软件计算出二冷各区的冷却水流量并应用于生产,铸坯表面和内部无裂纹,力学性能与未加S、Ca元素的45钢相当,但切削性能有明显的改善,切削刀具寿命提高了25%以上。
A study was conducted to improve machinability by adding S and Ca to medium carbon 45 structural steels. The results show that when the w ([S]) is 0.06%, the total calcium w (T [Ca]) is 40 × 10-6 and the w ([Al] s) Was 57%. The number of inclusions less than 2.5μm accounted for 82% of the total number of inclusions, the inclusions were small and dispersed in steel. The plastic transition temperature of steel was found to be 1 100 ~ 1 000 ℃ by the thermal simulation test. The cooling water flow rate of the second cooling zone was calculated by water distribution software and applied to the production. The mechanical properties of the slab without cracks and S , Ca 45 steel equivalent, but significantly improved cutting performance, cutting tool life increased by 25% or more.